mirror of
https://github.com/schoebel/mars
synced 2024-12-24 23:52:46 +00:00
0615ab3a23
block/mars/kernel/mars_copy.c:466:2: warning: case label value is less than minimum value for type [-Wswitch-outside-range]
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
|
|
* MARS Long Distance Replication Software
|
|
*
|
|
* This file is part of MARS project: http://schoebel.github.io/mars/
|
|
*
|
|
* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
|
|
* Copyright (C) 2011-2014 1&1 Internet AG
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef MARS_COPY_H
|
|
#define MARS_COPY_H
|
|
|
|
#include <linux/wait.h>
|
|
|
|
#define INPUT_A 0
|
|
#define INPUT_B 1
|
|
#define COPY_INPUT_NR 2
|
|
|
|
extern int mars_copy_overlap;
|
|
extern int mars_copy_strict_write_order;
|
|
extern int mars_copy_timeout;
|
|
extern int mars_copy_read_prio;
|
|
extern int mars_copy_write_prio;
|
|
extern int mars_copy_read_max_fly;
|
|
extern int mars_copy_write_max_fly;
|
|
|
|
extern atomic_t global_copy_read_flight;
|
|
extern atomic_t global_copy_write_flight;
|
|
|
|
enum _copy_state {
|
|
COPY_STATE_RESET = -1,
|
|
COPY_STATE_START = 0, // don't change this, it _must_ be zero
|
|
COPY_STATE_START2,
|
|
COPY_STATE_READ1,
|
|
COPY_STATE_READ2,
|
|
COPY_STATE_READ3,
|
|
COPY_STATE_WRITE,
|
|
COPY_STATE_WRITTEN,
|
|
COPY_STATE_CLEANUP,
|
|
COPY_STATE_FINISHED,
|
|
} __packed;
|
|
|
|
struct copy_state {
|
|
struct mref_object *table[2];
|
|
bool active[2];
|
|
enum _copy_state state;
|
|
bool writeout;
|
|
short prev;
|
|
unsigned short len;
|
|
short error;
|
|
};
|
|
|
|
struct copy_mref_aspect {
|
|
GENERIC_ASPECT(mref);
|
|
struct copy_input *input;
|
|
struct copy_brick *brick;
|
|
unsigned queue;
|
|
};
|
|
|
|
struct copy_brick {
|
|
MARS_BRICK(copy);
|
|
// parameters
|
|
struct mars_limiter *copy_limiter;
|
|
loff_t copy_start;
|
|
loff_t copy_end; // stop working if == 0
|
|
int io_prio;
|
|
int append_mode; // 1 = passively, 2 = actively
|
|
bool verify_mode; // 0 = copy, 1 = checksum+compare
|
|
bool repair_mode; // whether to repair in case of verify errors
|
|
bool recheck_mode; // whether to re-check after repairs (costs performance)
|
|
bool utilize_mode; // utilize already copied data
|
|
bool abort_mode; // abort on IO error (default is retry forever)
|
|
// readonly from outside
|
|
loff_t copy_last; // current working position
|
|
loff_t copy_dirty; // end of current working area
|
|
struct lamport_time copy_last_stamp;
|
|
int copy_error;
|
|
int copy_error_count;
|
|
int verify_ok_count;
|
|
int verify_error_count;
|
|
bool low_dirty;
|
|
bool is_aborting;
|
|
// internal
|
|
bool trigger;
|
|
bool terminated;
|
|
unsigned long clash;
|
|
atomic_t total_clash_count;
|
|
atomic_t io_flight;
|
|
atomic_t copy_read_flight;
|
|
atomic_t copy_write_flight;
|
|
long long last_jiffies;
|
|
wait_queue_head_t event;
|
|
struct task_struct *thread;
|
|
struct copy_state **st;
|
|
};
|
|
|
|
struct copy_input {
|
|
MARS_INPUT(copy);
|
|
loff_t check_hint;
|
|
};
|
|
|
|
struct copy_output {
|
|
MARS_OUTPUT(copy);
|
|
};
|
|
|
|
MARS_TYPES(copy);
|
|
|
|
#endif
|